/*
 * Copyright (C) 2000-2008 Jens Nixdorf and various contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies of the Software, its documentation and marketing & publicity
 * materials, and acknowledgment shall be given in the documentation, materials
 * and software packages that this Software was used.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package org.mopore.jat.gui;

import java.awt.Window;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.util.Arrays;
import java.util.Map;
import java.util.WeakHashMap;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * @author Jens Nixdorf
 *
 */
public class WindowControllerClosingAdapter extends WindowAdapter {
	
	private final WindowController windowController;
	
	private final Map<String, WindowListener> attachedWindows;

	private final Log log = LogFactory.getLog(getClass().getName());
	
	public WindowControllerClosingAdapter( WindowController windowController ) {
		this.windowController = windowController;
		attachedWindows = new WeakHashMap<String, WindowListener>();
	}
	
	public void attach( final Window window, final String windowKey ) {
		
		WindowListener windowAdapter = attachedWindows.get( windowKey );
		if ( windowAdapter == null ) {
			windowAdapter = new WindowAdapter() {
				@Override
				public void windowClosed(WindowEvent e) {
					windowController.informAboutClosing( windowKey );
				}
			};
		}
		else {
			WindowListener[] listeners = window.getWindowListeners();
			boolean alreadyAttached = Arrays.asList( listeners ).contains( windowAdapter );
			
			if ( alreadyAttached ) {
				log.debug( "closing adapter already attached" );
				return;
			}
		}
		
		log.debug( "attach closing adapter ");
		window.addWindowListener( windowAdapter );
		attachedWindows.put( windowKey, windowAdapter );
	}
	
}
